Image reading system and image reading program

An image reading program in an image reading system which can read a film original and performs at least two scanning operations including prescanning and actual scanning, comprising:

• a prescanning module for obtaining prescanned image data;
• an actual scanning module for obtaining actually scanned image data;
• and
• a film type selecting module,
• wherein a film type can be selected in the film type selecting module after obtaining at least the prescanned image data.

An image reading system which can read a film original and performs at least two scanning operations including prescanning and actual scanning, comprising:

• a photoelectric conversion unit adapted to read light having transmitted through the film original and converting the transmitted light into an electrical signal;
• an adjustment unit adapted to adjust level of the electrical signal output from said photoelectric conversion means;
• an A/D conversion unit adapted to convert the electrical signal whose level is adjusted by said adjustment unit into digital data;
• a table conversion processing unit adapted to perform table conversion processing for the digital data by using a look-up table;
• and
• a control unit adapted to determine an exposure state of the film original from prescanned image data which has undergone table conversion processing by said table conversion processing unit and is linear with respect to an output from said A/D conversion unit, setting an adjustment state of said adjustment unit in actual scanning in accordance with the exposure state, performing digital calculation for the prescanned image data, and generating display image data which reflects a setting of the adjustment state.

An image reading program in an image reading system which can read a film original, comprises a photoelectric conversion unit adapted to read light having transmitted through the film original and converting the transmitted light into an electrical signal, an adjustment unit adapted to adjust level of the electrical signal output from the photoelectric conversion unit, and an A/D conversion unit adapted to convert the electrical signal whose level is adjusted by the adjustment unit into digital data, and performs at least two scanning operations including prescanning and actual scanning, comprising:

• a table conversion processing module for performing table conversion processing for the digital data by using a look-up table;
• a determining module for determining an exposure state of the film original from prescanned image data which has undergone table conversion processing by the table conversion processing module and is linear with respect to an output from the A/D conversion unit, and setting an adjustment state of the adjustment unit in actual scanning in accordance with the exposure state;
• and
• an image data generating module for performing digital calculation for the prescanned image data, and generating display image data which reflects a setting of the adjustment state.